33812688709 has 2 divisors, whose sum is σ = 33812688710. Its totient is φ = 33812688708.

The previous prime is 33812688703. The next prime is 33812688737. The reversal of 33812688709 is 90788621833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17344099809 + 16468588900 = 131697^2 + 128330^2 .

It is a cyclic number.

It is not a de Polignac number, because 33812688709 - 2²¹ = 33810591557 is a prime.

It is a super-2 number, since 2×33812688709² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33812688709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33812688703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16906344354 + 16906344355.

It is an arithmetic number, because the mean of its divisors is an integer number (16906344355).

Almost surely, 2^33812688709 is an apocalyptic number.

It is an amenable number.

33812688709 is a deficient number, since it is larger than the sum of its proper divisors (1).

33812688709 is an equidigital number, since it uses as much as digits as its factorization.

33812688709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 33812688709 in words is "thirty-three billion, eight hundred twelve million, six hundred eighty-eight thousand, seven hundred nine".